Base weight

Why total pack weight is not comparable

Weigh your loaded pack at the trailhead and the number tells you almost nothing comparable, because a five-day trip carries five days of food and a Saturday overnight doesn't. Strip out the things you consume, food, water and fuel, and what remains is base weight: shelter, sleep system, pack, layers, cooking hardware, everything that comes home the same weight it left.

Worn weight and consumables

Two conventions travel with it. Worn weight, the boots and clothes on your body, is excluded by most people, which is why you'll see hikers wearing their heaviest layer on the scales day. And skin-out weight is the version that includes everything, worn and carried, which is a more honest measure and much less commonly quoted.

The thresholds people use

The thresholds people use: under 20 lb is lightweight, under 10 lb is ultralight, and under 5 lb is superultralight and involves real compromises. Most people start somewhere in the mid-20s and get to the high teens by replacing the biggest three items rather than by counting grams. Weigh everything, sort the list by weight, and the answer is usually obvious.

How to actually measure it

Weigh everything once, on a kitchen scale, and write it down. Estimating from product pages does not work: quoted weights routinely exclude stuff sacks, exclude the stakes you will really use, and describe a size you did not buy. The gap between a spreadsheet built from listings and the same kit on a scale is commonly a pound or more.

Do it item by item rather than weighing the loaded pack, because the itemised list is the thing that tells you where the weight is. Almost everyone who does this for the first time finds two or three items that weigh far more than they assumed.

Where the weight actually is

Pack, shelter and sleep system, usually somewhere between half and two thirds of the total. That is why every serious attempt at cutting base weight starts there, and why swapping to a titanium spork accomplishes nothing measurable.

The rest is a long tail of small things, and the tail is where weight creeps back in over a season: the spare battery you never used, the second buff, the book, the backup lighter. It is worth re-weighing a kit once a year purely to find what has accumulated.

Why chasing the number has diminishing returns

Going from 25 lb to 15 lb is mostly free: it is buying the right pack for the load rather than an oversized one, replacing gear that was never light, and leaving behind things you have never used. Going from 12 lb to 9 lb costs real money and real comfort, and going below that starts costing margin.

The honest version of the exercise is asking what each item buys you rather than what it weighs. An extra pound of insulation that lets you sleep is worth more than three ounces saved on a stove.